Ocular allergy affects up to 40% of the general population and has become increasingly prevalent in the last four decades. The symptoms include intense itching, photophobia (discomfort of light) and lacrimation (secretion of tears). Such symptoms affect daily leisure and work activities of adults and children and, consequently, overall wellbeing and quality of life. The most common clinical form of ocular allergy is conjunctivitis (inflammation of the conjunctiva), which is usually associated with allergic rhinitis.

SAC-related symptoms occur following a cascade of inflammatory responses when a sensitised individual is exposed to an allergen. This allergic cascade includes the release of a number of preformed and newly synthesised inflammatory mediators.

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